//
//  AuthenticationErrors.swift
//  BiometricAuthentication
//
//  Copyright (c) 2018 Rushi Sangani
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import Foundation
import LocalAuthentication

/// Authentication Errors
public enum AuthenticationError: Error {
    
    case failed, canceledByUser, fallback, canceledBySystem, passcodeNotSet, biometryNotAvailable, biometryNotEnrolled, biometryLockedout, other
    
    public static func initWithError(_ error: LAError) -> AuthenticationError {
        switch Int32(error.errorCode) {
            
        case kLAErrorAuthenticationFailed:
            return failed
        case kLAErrorUserCancel:
            return canceledByUser
        case kLAErrorUserFallback:
            return fallback
        case kLAErrorSystemCancel:
            return canceledBySystem
        case kLAErrorPasscodeNotSet:
            return passcodeNotSet
        case kLAErrorBiometryNotAvailable:
            return biometryNotAvailable
        case kLAErrorBiometryNotEnrolled:
            return biometryNotEnrolled
        case kLAErrorBiometryLockout:
            return biometryLockedout
        default:
           return other
        }
    }
    
    // get error message based on type
    public func message() -> String {
        let authentication = BioMetricAuthenticator.shared
        
        switch self {
        case .canceledByUser, .fallback, .canceledBySystem:
            return ""
        case .passcodeNotSet:
            return authentication.faceIDAvailable() ? kSetPasscodeToUseFaceID : kSetPasscodeToUseTouchID
        case .biometryNotAvailable:
            return kBiometryNotAvailableReason
        case .biometryNotEnrolled:
            return authentication.faceIDAvailable() ? kNoFaceIdentityEnrolled : kNoFingerprintEnrolled
        case .biometryLockedout:
            return authentication.faceIDAvailable() ? kFaceIdPasscodeAuthenticationReason : kTouchIdPasscodeAuthenticationReason
        default:
            return authentication.faceIDAvailable() ? kDefaultFaceIDAuthenticationFailedReason : kDefaultTouchIDAuthenticationFailedReason
        }
    }
}

@objc public enum AuthenticationErrorOBJC: Int {
    case failed, canceledByUser, fallback, canceledBySystem, passcodeNotSet, biometryNotAvailable, biometryNotEnrolled, biometryLockedout, other
    
    public static func initWithError(_ error: LAError) -> AuthenticationErrorOBJC {
        switch Int32(error.errorCode) {
            
        case kLAErrorAuthenticationFailed:
            return failed
        case kLAErrorUserCancel:
            return canceledByUser
        case kLAErrorUserFallback:
            return fallback
        case kLAErrorSystemCancel:
            return canceledBySystem
        case kLAErrorPasscodeNotSet:
            return passcodeNotSet
        case kLAErrorBiometryNotAvailable:
            return biometryNotAvailable
        case kLAErrorBiometryNotEnrolled:
            return biometryNotEnrolled
        case kLAErrorBiometryLockout:
            return biometryLockedout
        default:
           return other
        }
    }
    
    // get error message based on type
    public func message() -> String {
        let authentication = BioMetricAuthenticator.shared
        
        switch self {
        case .canceledByUser, .fallback, .canceledBySystem:
            return ""
        case .passcodeNotSet:
            return authentication.faceIDAvailable() ? kSetPasscodeToUseFaceID : kSetPasscodeToUseTouchID
        case .biometryNotAvailable:
            return kBiometryNotAvailableReason
        case .biometryNotEnrolled:
            return authentication.faceIDAvailable() ? kNoFaceIdentityEnrolled : kNoFingerprintEnrolled
        case .biometryLockedout:
            return authentication.faceIDAvailable() ? kFaceIdPasscodeAuthenticationReason : kTouchIdPasscodeAuthenticationReason
        default:
            return authentication.faceIDAvailable() ? kDefaultFaceIDAuthenticationFailedReason : kDefaultTouchIDAuthenticationFailedReason
        }
    }
}
